Coeliac Screen (Tissue Transglutaminase IgA)

This blood test measures tTg-IgA, the antibody most often used to investigate coeliac disease, to help you decide whether further testing is worthwhile. It suits adults eating a normal, gluten-containing diet who want a first coeliac check.

  • At-home test
  • Doctor reviewed
Sample
Blood
Collection
At-home finger-prick or venous draw at clinic or nurse home visit
Results in
5 days
Biomarkers
1
Doctor reviewed
Yes
Tests for
  • tTg-IgA (Tissue Transglutaminase IgA)

Test specifications

Sample type
blood
Collection method
at-home finger-prick or venous draw at clinic or nurse home visit
Turnaround time
5 days
Biomarkers tested
1
At-home test
Yes
Doctor reviewed
Yes
Gender focus
Both

What's tested

1 biomarker as listed by Blue Horizon Medicals.

  • tTg-IgA (Tissue Transglutaminase IgA)

About this test

This test measures tTg-IgA, the antibody Blue Horizon describes as the most frequently used marker for investigating coeliac disease, alongside total IgA if the main result is very low. A raised result is consistent with coeliac disease, while a negative result makes it less likely, though the provider is clear this needs a normal, gluten-containing diet for 6 weeks beforehand to be meaningful.

Against the 11 tests in its comparison group, this test's £106.25 price sits well below the £169 median, and it undercuts most named peers such as Medichecks' £169 Coeliac Blood Test and London Medical Laboratory's £124 Coeliac/Gluten Sensitivity Profile. It isn't the cheapest option overall: Check My Body Health's £15.99 self-test and Bluecrest Wellness's £65 test both cost less, though with a single marker each. Its single-marker depth is in line with the group median, so the strong value score reflects price rather than extra biomarkers.

Collection is flexible, with an at-home finger-prick option alongside clinic and nurse-visit draws, and a doctor reviews the result, which supports its scores for collection convenience and for results and follow-up. Trust signals draw on Blue Horizon's 4.2 Trustpilot rating from 395 reviews and its UKAS ISO 15189 partner labs, both provider-wide rather than specific to this test.

Who is it for?

This suits adults who can eat a normal, gluten-containing diet for six weeks before testing and want an affordable first check for coeliac disease, for example because of ongoing digestive symptoms. It's also a reasonable middle option if you want more than a bargain self-test kit but don't need the extra markers in panels like Selph's £63, 4-marker Coeliac Disease Blood Test.

If budget is the only concern and you're comfortable with a self-collected result, Check My Body Health's £15.99 Coeliac Self-Test is cheaper, though it carries less provider oversight than this doctor-reviewed test.

How it works

You can collect a blood sample at home with a finger-prick kit, or have a venous draw at a clinic or during a nurse home visit. The lab tests for tTg-IgA (and total IgA if needed), with results back within 5 days, reviewed by a doctor before you receive your report. You need to be eating a normal, gluten-containing diet for 6 weeks before the test.

Pros & cons

Pros

  • Priced well below the £169 median for coeliac tests in its comparison group.
  • Cheaper than most named rival coeliac tests, including Medichecks and London Medical Laboratory.
  • Includes a doctor's review of your result.
  • At-home finger-prick collection is available alongside clinic and nurse-visit options.

Cons

  • Not the cheapest coeliac option: Check My Body Health's self-test is £15.99 and Bluecrest's is £65.
  • Only one marker, where some rivals such as Selph and Randox Health test three or four.
  • Requires 6 weeks on a normal, gluten-containing diet beforehand for an accurate result.

Our editorial score

Compare Health Test Score Mid-priced coeliac check, cheaper than most rivals
Editorial confidence: 10.0/10

This single-marker coeliac screen costs £106.25, well below the £169 median for the 11 tests in its comparison group, and cheaper than most named rivals, though Check My Body Health's £15.99 self-test and Selph's £63 blood test undercut it. Results take 5 days and include a doctor review, but you need to eat a normal, gluten-containing diet for 6 weeks beforehand.

Score breakdown

  • Clarity and documentation 8.0/10

    The listing publishes a short description, the full biomarker list, a stated turnaround, clear collection options, the sample type; it does not state what the report looks like.

  • Clinical depth 7.1/10

    1 biomarkers against a median of 1 across the 11 tests in its comparison group.

  • Collection convenience 9.0/10

    A finger-prick sample you take at home; with a venous or clinic option as well; a home nurse visit is offered; results in around 5 days, in line with or faster than similar tests.

  • Results and follow-up 7.0/10

    Results are reviewed by a doctor; the provider does not describe the report format.

  • Trust signals 7.5/10

    Trustpilot 4.2 from 395 reviews; accredited lab (UKAS ISO 15189 partner labs); trading 17+ years.

  • Value for money 9.1/10

    £106.25 against a comparison-group median of £169.00 (-37%).

Calculated 13 September 2026 from the facts we hold about this test and provider, using our published scoring formula. Scores are not hand-edited.

Compare with similar tests

This test belongs to our Coeliac test comparison group. See how it stacks up against equivalent tests from other providers.

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Coeliac Disease Blood Test

Broad coeliac panel priced well below rivals

A 4-antibody blood panel used to assess for coeliac disease, covering tissue transglutaminase, endomysial and deamidated gliadin antibodies plus total IgA, for people with ongoing gut symptoms after eating gluten.

  • At-home test
9.4 / 10

Essential IBS Test

Broad symptom screen priced above the coeliac group median

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Coeliac Blood Test

Market-median price, lighter on markers than some rivals

Checks for antibodies linked to the body's immune response to gluten, plus total IgA, to help assess whether coeliac disease could be a concern. Suits people with symptoms such as bloating or fatigue who still eat gluten.

8.3 / 10